Klaus Ahlund
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Today, Swedish singer Robyn dropped “Missing U,” her first solo single in eight years. Over the last several years, the cult pop star has released a series of collaborative EPs, but the new track is the first official taste of her follow-up to 2010’s Body Talk. (A snippet of another new track, “Honey,” was featured in an episode of the final season of HBO’s Girls last year.)

Katy Perry, “Walking on Air”: Produced by Klaus Åhlund, the man behind much of Robyn’s Body Talk, the latest promotional single from Katy Perry’s Prism, due out October 22nd, is a surprising and effective throwback to early-’90s house.